One can certainly get energy from fat on rides as well. There is no need for sugar. That is a fallacy that seems to never want to die. Our bodies are perfectly suited for endurance without the use of sugar. Look at what traditional cultures like Sherpas and the American Indians used for long treks. Sherpas use yak butter or any other type of fat mixed with whatever small amount of berries and meat was available to make it palatable. American Indians, too, took Pemmican which was usually fat with berries and meat. Minimal carbs in both of these sustained endurance foods. Sherpas, especially, should know the proper foods to eat for endurance and energy sustaining meals and they took FAT. American Indians, in particular, usually had regular access to honey and if that was the ideal food for long distance endurance, they would likely have stored it up and carried it with them for that purpose. Instead they, like Sherpas, took fat. Simple carbs are unnecessary and one could easily do endurance rides, I've done it, using easily digestible coconut oil for energy.